Posted by **Sim** on Thursday, March 22, 2012 at 9:46pm.

Mathew has received $1 the first week, $3 the 2nd week, $5 the 3rd week and so on until he has received a total of

$1 000 000. What amount did he receive the last week?

- Math -
**Reiny**, Thursday, March 22, 2012 at 11:18pm
looks like an arithmetic series where

a = 1 , d = 2, n = ?

Sum(n) = 1000000

(n/2)(2 + (n-1)(2) ) = 1000000

n( 2 + 2n - 2) = 2000000

2n^2 = 2000000

n^2 = 1000000

n = 1000

so term (1000) = a + 999d = 1 + 2(999) = 1999

## Answer This Question

## Related Questions

- Math - Invitations were sent one week before the big event. Replies started ...
- math - One week Laura earned a total of $350. Of that amount $245 were tips. If...
- math - One week Laura earned a total of $350. Of that amount $245 were tips. If ...
- Word Problem - Check Answer (geometric Seq) - 1) Suppose five people are ill ...
- math - Jane uses a jar to save her money. She saves $10 from her weekly ...
- math - You receive a salary of $400 each week plus 12.5% commission on all sales...
- Statistics - In the week before and the week after a holiday, there were 12,000 ...
- math - To train for a triathlon Cartman swims 125m daily for one week.Each ...
- business and finite calc - 2) The amount of gasoline sold every week at a gas ...
- statistics - According to the Journal of the American Medical Association, the ...

More Related Questions